String of Pearls Plant

Have 4 pots of Strings of Pearls that I had at work. Brought them home and 2 of the pots have some Pearls that are soft and white looking...Plants still look very good but was wondering why this has happen. Have pulled off all the white soft pearls...These plants get only morning light and are on a flower rack under a Crape Myrtle tree. Is this happening maybe because of too much rain or watering...Just don't want these plants to die...I have rooted all of them and they are Beautiful. Please let me know what you think I should do...Thanks Jacquelyn